Service Instruction - ABB HPA 12kV Instruction For Installation, Service And Maintenance

Functional check is carried out as follows
1. Connect the sensor to the connecting link of the poles, see fig. 10.
2. Check with the aid of vernier callipers that the movement from open to closed
positions is 81 - 85 mm.
3. Adjust the oscilloscopes input to 85 mm, see fig. 9.
4. Make an opening operation. The curve on the oscilloscope should be as shown in
fig. 9.
5. Make a closing operation.
6. If the speeds are not correct, the spring force is to be adjusted. See section 1.4.9
"Adjustment of operating device".
1.4 Service instructions
Safety instructions - For dismantling and servicing of breakers, the following
Fig - 10
(Connection of capacitive sensor)
steps should be followed:
1. Disconnect the breaker.
2. Pull out the breaker on the door.
3. Manually release the closing springs.
4. Manually release the opening springs.
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